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A concrete structure is considered to be of adequate durability if it performs in accordance with its intended level of functionality and serviceability over an expected or predicted life cycle. Concrete durability depends largely on the ease (or difficulty) with which fluids (water, carbon dioxide, oxygen) in the form of liquid or gas can migrate through the hardened concrete mass. Concrete is a porous material. Therefore, moisture movement can occur by flow, diffusion, or sorption. We are concerned with all three, but generally, the overall potential for moisture in concrete by these three modes is referred to as its permeability.

General Description & Specifications

The set up consists of permeability cell, water reservoir, and pressure lines, with glass bottles.

Permeability Cell

Consists of a metal cylinder with a ledge at the bottom for retaining the specimen, a flange at the top, removable cover plate and a funnel. A rubber gasket is seated in matching grooves, between the cell and the cover plate, to render the joint watertight. Internal working size of the cell will be 100mm dia X 100mm high.

Water Reservoir

Consists of a length of metal pipe, 50 to 100 mm in diameter and about 500 mm long. The reservoir fitted with a graduated side arm gauge-glass for admitting water and compressed air and a cock for drainage, bleeding and connection to the permeability cell.

Pressure Lines

Heavy duty armored rubber hose with end fittings. Complete with glass bottles but without a compressor. For specimen size 100 X 100 mm

Information

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